scholarly journals Is Didymosphenia geminata an introduced species in New Zealand? Evidence from trends in water chemistry, and chloroplast DNA

2017 ◽  
Vol 8 (2) ◽  
pp. 904-919 ◽  
Author(s):  
Cathy Kilroy ◽  
Phil Novis
Keyword(s):  
New Zealand ◽  
Water Chemistry ◽  
Chloroplast Dna ◽  
Introduced Species ◽  
Didymosphenia Geminata

scholarly journals Ulva,UmbraulvaandGemina: genetic survey of New Zealand taxa reveals diversity and introduced species

2009 ◽  
Vol 44 (2) ◽  
pp. 143-154 ◽  
Author(s):  
Svenja Heesch ◽  
Judy E.S. Broom ◽  
Kate F. Neill ◽  
Tracy J. Farr ◽  
Jennifer L. Dalen ◽  
...  
Keyword(s):  
New Zealand ◽  
Introduced Species ◽  
Genetic Survey

scholarly journals The key roles of seed banks in plant biodiversity management in New Zealand

2010 ◽  
Vol 14 ◽  
pp. 5-11
Author(s):  
W.M. Williams
Keyword(s):  
New Zealand ◽  
Introduced Species ◽  
Intrinsic Value ◽  
Seed Banks ◽  
Indigenous Species ◽  
Plant Biodiversity ◽  
Biodiversity Management ◽  
Recent Initiative ◽  
New Zealand Flora ◽  
Pasture Plants

The New Zealand flora is a mixture of indigenous and introduced species. The indigenous species have a high intrinsic value while the introduced species include all of the crop and pasture plants upon which the export-led economy depends. New Zealand must maintain both of these important sources of biodiversity in balance. Seed banks are useful tools for biodiversity management. In New Zealand, a seed bank for indigenous species has been a very recent initiative. By contrast, seed banks for introduced species have been established for over 70 years. The reasons for this discrepancy are discussed. For the economic species, conserved genetic diversity is used to enhance productivity and the environment. Large advances can be gained from species that are not used as economic plants. The gene-pool of white clover has been expanded by the use of minor species conserved as seeds in the Margot Forde Germplasm Centre. Keywords: Seed banks, biodiversity conservation, New Zealand flora

A review of the fern genus Pellaea (Pteridaceae) in Australasia

2020 ◽  
Author(s):  
Patrick J. Brownsey ◽  
Daniel J. Ohlsen ◽  
Lara D. Shepherd ◽  
Whitney L. M. Bouma ◽  
Erin L. May ◽  
...  
Keyword(s):  
New Zealand ◽  
Chloroplast Dna ◽  
Dna Sequences ◽  
Sequence Data ◽  
Indigenous Species ◽  
Ploidy Levels ◽  
Dna Sequence Data ◽  
Australian Species ◽  
The Status ◽  
Chloroplast Dna Sequences

Five indigenous species of Pellaea in Australasia belong to section Platyloma. Their taxonomic history is outlined, morphological, cytological and genetic evidence for their recognition reviewed, and new morphological and chloroplast DNA-sequence data provided. Australian plants of P. falcata (R.Br.) Fée are diploid and have longer, narrower pinnae than do New Zealand plants previously referred to P. falcata, which are tetraploid. Evidence indicates that P. falcata does not occur in New Zealand, and that collections so-named are P. rotundifolia (G.Forst.) Hook. Chloroplast DNA sequences are uninformative in distinguishing Australian P. falcata from New Zealand P. rotundifolia, but show that Australian P. nana is distinct from both. Sequence data also show that Australian and New Zealand populations of P. calidirupium Brownsey & Lovis are closely related, and that Australian P. paradoxa (R.Br.) Hook. is distinct from other Australian species. Although P. falcata is diploid and P. rotundifolia tetraploid, P. calidirupium, P. nana (Hook.) Bostock and P. paradoxa each contain multiple ploidy levels. Diploid populations of Pellaea species are confined to Australia, and only tetraploids are known in New Zealand. Evolution of the group probably involved hybridisation, autoploidy, alloploidy, and possibly apomixis. Further investigation is required to resolve the status of populations from Mount Maroon, Queensland and the Kermadec Islands.

Physicochemical predictors of the invasive diatom Didymosphenia geminata at multiple spatial scales in New Zealand rivers

2015 ◽  
Vol 50 (1) ◽  
pp. 1-14 ◽  
Author(s):  
Jonathan Bray ◽  
Jon S. Harding ◽  
Cathy Kilroy ◽  
Paul Broady ◽  
Philippe Gerbeaux
Keyword(s):  
New Zealand ◽  
Spatial Scales ◽  
Didymosphenia Geminata ◽  
Multiple Spatial Scales
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